The phrase "genocidal maniac" refers to a person who is crazy or obsessed with causing genocide, which is the deliberate killing of a large group of people based on their race, ethnicity, religion, or other factors. Full definition
He is judging us to see if we are good enough to make it into paradise (which means, whether we believe in christ as messiah or not, has nothing to do with anything else since genocidal maniacs and Gandhi suffer an equivalency under this morality). (religion.blogs.cnn.com)